Question about Texas Instruments TI-84 Plus Calculator

Y=(1/2)*cos(x)

Posted on Apr 02, 2013

Sure.

Press Y=. Type in ( 1 / 2 ) * cos( X ) ENTER

Press GRAPH to see the graph.

If the graph isn't too clear, press WINDOW and change Ymin to -2 and Ymax to 2, then press GRAPH again.

Note: for -2, be sure to use the (-) key next to the decimal point instead of the - between the multiply and the add.

Posted on Feb 19, 2010

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Posted on Jan 02, 2017

That is a round-about way to solve cos(x)=0.543 by graphing. Use the inverse function of the cosine arccos or cos^-1

If cos(x)=0.543 then** x=arccos(0.543)**

To graph a trigonometric function it is more natural to use the radian as the unit. However in geometry it is more common to use the degree. To solve an equation like**x=arccos(0.543)** where you want the answer to be degree, change the document settings to make the default angle unit the degree.

Make the graphing angle unit the degree and set that as default by selecting Make Default and press Enter.

If cos(x)=0.543 then

To graph a trigonometric function it is more natural to use the radian as the unit. However in geometry it is more common to use the degree. To solve an equation like

Make the graphing angle unit the degree and set that as default by selecting Make Default and press Enter.

Dec 15, 2013 | Texas Instruments TI-Nspire CX Graphing...

You have several types of graphs

**Function graph**s

Y_1=f(x), Y1=3X^2-4, [X, T, Theta, n] key types**X**

**Polar graphs** r=F(theta), r=r_o*ln(theta). [X, T, Theta, n] types **Theta **

**Parametric graphs** X_1=f(T) and Y_1=g(T). [X.T, Theta, n] types **T**

Examples: X_1= cos(T). Y_1= 2(1--sin(T))

**Sequence graphs **u_n+1= f(u_n), [X,T,Theta,n] types **n**

Y_1=f(x), Y1=3X^2-4, [X, T, Theta, n] key types

Examples: X_1= cos(T). Y_1= 2(1--sin(T))

Nov 21, 2013 | Texas Instruments TI-84 Plus Calculator

You have several types of graphs

**Function graph**s

Y_1=f(x), Y1=3X^2-4, [X, T, Theta, n] key types**X**

**Polar graphs** r=F(theta), r=r_o*ln(theta). [X, T, Theta, n] types **Theta **

**Parametric graphs** X_1=f(T) and Y_1=g(T). [X.T, Theta, n] types **T**

Examples: X_1= cos(T). Y_1= 2(1--sin(T))

**Sequence graphs **u_n+1= f(u_n), [X,T,Theta,n] types **n**

Y_1=f(x), Y1=3X^2-4, [X, T, Theta, n] key types

Examples: X_1= cos(T). Y_1= 2(1--sin(T))

Nov 21, 2013 | Texas Instruments TI-84 Plus Silver...

If the angle unit is set to degrees and you use the standard window dimensions (Xmin=-10, Xmax=10) then all you will see is a straight line: Between 0 and 10 degrees, the sine is approximately equal to 0 and the cosine is about 1.

To see the features of the trigonometric functions you must do one of the following

To see the features of the trigonometric functions you must do one of the following

- Set angle to degree but set window dimensions to span the domain -180 to 180 or larger.
- Set windows dimensions to the standard -10, 10 range but set angle degree to radians

May 12, 2012 | Texas Instruments TI-84 Plus Calculator

Make sure you have the angular mode set to radians. In degree, the graph of sine(x) is nearly a straight line for small values of x.

May 08, 2012 | Texas Instruments TI-Nspire CAS Graphing...

To enter powers of trigonometric functions you must enclose the functions in parentheses and then apply the exponent to the whole. For example X1t =(sin T)^3 , Y1t=(cos T)^3 will give you a shape similar to a rhombus with concave sides. The symbol ^syands for the operation of raising to a power. The key is the one with the caret symbol ^ , and it is wedged between the xsqure and EXIT keys (third row of keys).

As regards the cotangent, use the equivalent definition cot(X)=1/tan(X).

As regards the cotangent, use the equivalent definition cot(X)=1/tan(X).

Jul 26, 2011 | Casio FX-9750GPlus Calculator

I believe it has to do with your angle unit. If you angle unit is set to degree and your default window dimensions are -10, 10, then the sine function will look like y=x ( straight line) and y=cos(X) is approximately 1 in that domain.

Your solution is one of the following.

Use degree as angle unit, but change the window dimensions for x to -180 to 180 and the y-dimensions to the interval -1 to 1.

Use the radian angle unit and leave the Xmin-Xmax interval -10 to 10.

Your solution is one of the following.

Use degree as angle unit, but change the window dimensions for x to -180 to 180 and the y-dimensions to the interval -1 to 1.

Use the radian angle unit and leave the Xmin-Xmax interval -10 to 10.

May 04, 2011 | Casio FX-9860G Slim Graphic Calculator

Having gone over a month without a response to my query, I assume it was a matter of the angular mode setting

Sep 20, 2010 | Texas Instruments TI-84 Plus Calculator

The cotangent function is not implemented on the TI84PLUS native OS and consequently you will not find its inverse function on the calculator. However, there exits an equivalence (definition) between arc cotangent(x) and arc tangent (1/x).

Thus cot^(-1)(X)= tan^(-1)(1/X),

Be careful. Since it is a multivariate function, some authors define the principal branch in the domain [0, PI], while others define the domain on [-Pi/2, Pi/2]. You will have to consult your textbook, or the documents you are using to find out the domain of the principal branch.

Thus cot^(-1)(X)= tan^(-1)(1/X),

Be careful. Since it is a multivariate function, some authors define the principal branch in the domain [0, PI], while others define the domain on [-Pi/2, Pi/2]. You will have to consult your textbook, or the documents you are using to find out the domain of the principal branch.

Apr 12, 2010 | Texas Instruments TI-84 Plus Calculator

Hello,

Here is one particulat gase where two graphs are executed simultaneously, yet you see one, but bo the other. When graphs are being executed the one for tan(x) is displayed as a bubble that outlines the variation of the tangente. But at the end, it evaporates, leaving only the sine function.

Here is the result.

Hope it helps.

Here is one particulat gase where two graphs are executed simultaneously, yet you see one, but bo the other. When graphs are being executed the one for tan(x) is displayed as a bubble that outlines the variation of the tangente. But at the end, it evaporates, leaving only the sine function.

Here is the result.

Hope it helps.

Jul 08, 2009 | Texas Instruments TI-83 Plus Calculator

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